[Intel-gfx] [PATCH 5/7] drm/i915: use vblank and vsync interrupts on 945

[Jesse Barnes]

On Fri, 26 Mar 2010 11:07:19 -0700
Jesse Barnes <jbarnes at virtuousgeek.org> wrote:

> On 945, vblank delivery alone seems unreliable.  The PIPE*STAT bits get
> set correctly, but interrupts occur at a low frequency relative to
> refresh.  If we enable VSYNC interrupts as well however (even though we
> only check for VBLANK interrupts when handling) we get the right
> frequency.  Increases OA performance on my AspireOne by about 300% with
> the new DRI2 bits, which rely on high frequency vblank events.
> 
> Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
> ---

Ignore this patch; it's still broken.  Working on a fix now.

-- 
Jesse Barnes, Intel Open Source Technology Center